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-rw-r--r--synapse/http/servlet.py9
1 files changed, 8 insertions, 1 deletions
diff --git a/synapse/http/servlet.py b/synapse/http/servlet.py
index 80acbdcf3c..dead02cd5c 100644
--- a/synapse/http/servlet.py
+++ b/synapse/http/servlet.py
@@ -35,6 +35,7 @@ from typing_extensions import Literal
 from twisted.web.server import Request
 
 from synapse.api.errors import Codes, SynapseError
+from synapse.http import redact_uri
 from synapse.http.server import HttpServer
 from synapse.types import JsonDict, RoomAlias, RoomID
 from synapse.util import json_decoder
@@ -664,7 +665,13 @@ def parse_json_value_from_request(
     try:
         content = json_decoder.decode(content_bytes.decode("utf-8"))
     except Exception as e:
-        logger.warning("Unable to parse JSON: %s (%s)", e, content_bytes)
+        logger.warning(
+            "Unable to parse JSON from %s %s response: %s (%s)",
+            request.method.decode("ascii", errors="replace"),
+            redact_uri(request.uri.decode("ascii", errors="replace")),
+            e,
+            content_bytes,
+        )
         raise SynapseError(
             HTTPStatus.BAD_REQUEST, "Content not JSON.", errcode=Codes.NOT_JSON
         )